* Saved another 400 bytes of gzipped CSS by optimizing the small_merge icon. I think I simply forgot this one when I did my initial round of GIF optimizations, given that all other small_* files are less than 150 bytes overall. (assets/small_merge.gif)
! Padding problem in media item pages. (media.css)
+ Added a skin option to allow resetting the menu to how it used to look like, so that you can build your skins upon long menus. I called it <shortmenu> and it's set to 1 by default (so that you get the short menu if you don't care, obviously), but I'm open to changing the name or whatever. Documented in Warm/skin, as usual. (Subs-Cache.php, Subs.php, Warm/skin.xml)

+ Added a separator between the Home menu's section list and the menu items (media, etc.) Also added placeholders for menu icons. Technically, you should extend #m_home_media if you want to add a Media icon to the submenu, and #m_media if you're explicitly disabling <shortmenu>. Of course. (I like saying 'of course' when it makes little sense. Makes me looks smart.) (Subs.php)

@ Happy now? :P
- Unused globals. (Subs.php, index.template.php)
* External links in messages will get the nofollow treatment until I find a smoother way to deal with human spam. I'm not in the mood to rewrite all parse_bbc calls to provide, in addition to the existing user ID, a flag indicating whether or not said user is proven to be 'real'. (install.sql)
- Removed ability to upload a png version of the flags. I can't really justify extra file_exists tests just for something nobody will ever bother with. Also finished converting all flag links to use gif. (ManageLanguages.php, Subs-Cache.php, TEMPLATES: Boards, ManageBoards, ManagePlugins, MessageIndex)
- Forgot flags in the installer. (install.php)

! Fixed missing argument when triggering an SQL error in the installer. (install.php)
! PHP < 5.5 fix. (Subs.php)
* Moved #greeting up a level. Simpler. (index.template.php, index.member.css)

- Removed some outdated clutter. (Wilder/extra.css, Wuthering/extra.css, extra.rtl.css)
* Actually, some of it wasn't clutter, just outdated, and needed some work. (Wilde/extra.css, Wuthering/extra.css)
- Time to say goodbye to IE6 support, little by little... While I'm trying to keep stuff working on it, I'm just removing cosmetic improvements. If it looks ugly, it's because you deserve it. (pngfix.js, */skin.xml)

* Turned <div class="frame"> into anonymous divs. Why..? Because "#my_id .frame" can break if you have multiple nested frame classes, so it's just better to force skinners to do "#my_id > div". I did say I was dropping official IE6 support anyway... (index.template.php, some CSS files)
- Removed the 'reset' class from footers, and hardcoded it into the footer list. Technically, it saves a few bytes of HTML, and even a few of CSS, so... Nothing to lose. (index.template.php, index.css)

- Forgot a .frame in the installer. (install.css)
! Fixed YouTube videos not getting embedded in the gallery if using the https protocol. (Subs-BBC.php)
Merge remote-tracking branch 'upstream/master'